Iranian President Hassan Rouhani speaks during a news conference in Tehran, Iran, Aug. 30, 2014. Iranian President Hassan Rouhani said Saturday although recent U.S. sanctions against some Iranian entities are harmful for confidence building, they will not hurt the principle of negotiations over Tehran's nuclear program. (Xinhua/Ahmad Halabisaz)

TEHRAN, Aug. 30 (Xinhua) -- Iranian President Hassan Rouhani said Saturday although recent U.S. sanctions against some Iranian entities are harmful for confidence building, they will not hurt the principle of negotiations over Tehran's nuclear program.

The new U.S. sanctions are inconsistent with the Geneva nuclear agreement and they "will deepen mistrust" and may hurt mutual confidence, the Iranian president said in a press conference.

"We will continue the talks until we reach a comprehensive agreement over Iran's nuclear issue," Rouhani said, adding that if no final agreement is reached, there will be on backward move to the situation that existed one year ago.

"It means the regime of sanctions have already begun to break up and we will continue to dismantle sanction system," he stressed.

"We will stand against this invasion and we are proud to circumvent sanctions," he told reporters, adding that the Iranian side is determined to achieve the final deal with the P5+1 group, including the five permanent UN Security Council members plus Germany.

For sure, the course of the talks is "tough and complicated," but there has been some progress in the past rounds of the negotiations, Rouhani said, urging the U.S. negotiators to continue the talks with "goodwill" and avoid what he called " further demands" from Iran.

Also, Iran's Foreign Ministry spokeswoman Marzieh Afkham said here on Saturday that the new sanctions imposed on Iranian individuals and firms by the United States violate spirit of ongoing nuclear talks.

Afkham said that Iran denounces any unilateral sanctions by the United States, adding that the government has handled domestic affairs despite sanctions.

Meanwhile, a senior Iranian lawmaker said Saturday that the new sanctions will leave negotiations over Tehran's nuclear program in a gridlock, Press TV reported.

"The negotiations with the West over Iran's nuclear energy program will fail to achieve a result given the U.S. excessive demands," spokesman for the National Security and Foreign Policy Commission of Iran's Majlis (parliament) Hossein Naqavi Hossein was quoted as saying.

The Americans pursued a policy of double standards in the nuclear talks, which will bring the negotiations to a standstill, Hossein said.

United States is the main obstacle in the way of an agreement on Tehran's nuclear energy program, the Iranian lawmaker said, adding that the new sanctions on Iran showed that Washington is not interested in a final nuclear agreement at all and it is just wasting time.

The United States on Friday imposed sanctions on a number of Iranian individuals and entities while pledging continued work toward a comprehensive solution to the Islamic republic's controversial nuclear program.

The U.S. Treasury Department targeted the networks for their alleged support to Iran's missile and nuclear programs as well as terrorism and for helping Tehran evade the existing sanctions.